Key points are not available for this paper at this time.
Recent results from baryon acoustic oscillation measurements by the Dark Energy Spectroscopic Instrument (DESI) have found preliminary evidence that dark energy (DE) evolves with time, as parameterized by a w₀ wₐ equation of state. In this study, we point out that the DESI-preferred w₀wₐ models are recovered when a w₀wₐ model is fit to DE produced by baryon conversion in cosmologically coupled black holes (BHs). This recovery does not require any ad hoc parameter adjustments; it solely depends on the independently measured cosmic star formation rate density. We discuss our result in the context of the missing baryon problem and the anomalously low sum of neutrino masses preferred by DESI. The global evolution of DE is an orthogonal probe of cosmological coupling, complementing constraints on BH mass growth from elliptical galaxies, stellar binaries, globular clusters, the LIGO-Virgo-KAGRA merging population, and X-ray binaries. A DE density that correlates with star formation is a natural outcome of cosmological coupling in BH populations.
Croker et al. (Mon,) studied this question.